How do you stop worldwide wars and conflicts?

The STate Department has been doing this effectively since World War II now.

However, under Trump the State department has so many unfilled jobs now under Trump this is no longer possible. So, as a direct result there will be more and more conflicts and confusions and likely even a nuclear war directly because of not having enough staff functioning or working anymore at the State Department?

Why?

Because Trump doesn't believe in a State Department and likely wants to thin out people on earth as much as possible which is happening now  that the state department has stopped functioning like it did under Obama and all previous presidents since World War II.

What is the U.S first line of defense?

If you were going to say our armed forces you would be wrong. Our armed forces are actually the 2nd and last line of defense where people are actually killed by our soldiers.

Before you start killing people you can talk to them first to see if a better arrangment can be reached before people start dying a lot.

So, a completely understaffed  state department like we now have is going to cost thousands to millions of people around the world their lives. This is a given if you are a logical and reasonable person.

Trump is not a peacemaker he is a war maker worldwide.

It's important you know this.